skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Discussion of liquid threshold pressure gradient

Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
Resource Type:
Journal Article: Published Article
Journal Name:
Additional Journal Information:
Journal Volume: 3; Journal Issue: 2; Related Information: CHORUS Timestamp: 2017-05-20 17:30:37; Journal ID: ISSN 2405-6561
Country of Publication:
Country unknown/Code not available

Citation Formats

Wang, Xiukun, and Sheng, James J. Discussion of liquid threshold pressure gradient. Country unknown/Code not available: N. p., 2017. Web. doi:10.1016/j.petlm.2017.01.001.
Wang, Xiukun, & Sheng, James J. Discussion of liquid threshold pressure gradient. Country unknown/Code not available. doi:10.1016/j.petlm.2017.01.001.
Wang, Xiukun, and Sheng, James J. Thu . "Discussion of liquid threshold pressure gradient". Country unknown/Code not available. doi:10.1016/j.petlm.2017.01.001.
title = {Discussion of liquid threshold pressure gradient},
author = {Wang, Xiukun and Sheng, James J.},
abstractNote = {},
doi = {10.1016/j.petlm.2017.01.001},
journal = {Petroleum},
number = 2,
volume = 3,
place = {Country unknown/Code not available},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.petlm.2017.01.001

Save / Share:
  • This is a response to comments recieved on a previously published paper
  • Increasing flow rates is a major problem in transporting petroleum as well as polymer solutions and melts. Industrial methods are often directed to reducing the effective viscosity: heating and pulsation. The latter is related to the nonlinearity in the properties. This paper studies the effects of pressure-gradient pulsations on the nonisothermal flow of a nonlinear liquid with memory in an annular channel.
  • It is shown that Ion Temperature Gradient turbulence close to the threshold exhibits a long time behaviour, with smaller heat fluxes at later times. This reduction is connected with the slow growth of long wave length zonal flows, and consequently, the numerical dissipation on these flows must be sufficiently small. Close to the nonlinear threshold for turbulence generation, a relatively small dissipation can maintain a turbulent state with a sizeable heat flux, through the damping of the zonal flow. Lowering the dissipation causes the turbulence, for temperature gradients close to the threshold, to be subdued. The heat flux then doesmore » not go smoothly to zero when the threshold is approached from above. Rather, a finite minimum heat flux is obtained below which no fully developed turbulent state exists. The threshold value of the temperature gradient length at which this finite heat flux is obtained is up to 30% larger compared with the threshold value obtained by extrapolating the heat flux to zero, and the cyclone base case is found to be nonlinearly stable. Transport is subdued when a fully developed staircase structure in the E × B shearing rate forms. Just above the threshold, an incomplete staircase develops, and transport is mediated by avalanche structures which propagate through the marginally stable regions.« less
  • The search for particle electric dipole moments (EDM's) is one of the best places to look for physics beyond the standard model of electroweak interaction because the size of time reversal violation predicted by the standard model is incompatible with present ideas concerning the creation of the baryon-antibaryon asymmetry. As the sensitivity of these EDM searches increases more subtle systematic effects become important. We develop a general analytical approach to describe a systematic effect recently observed in an electric dipole moment experiment using stored particles [J. M. Pendlebury et al., Phys. Rev. A 70, 032102 (2004)]. Our approach is basedmore » on the relationship between the systematic frequency shift and the velocity autocorrelation function of the resonating particles. Our results, when applied to well-known limiting forms of the correlation function, are in good agreement with both the limiting cases studied in recent work that employed a numerical and heuristic analysis. Our general approach explains some of the surprising results observed in that work and displays the rich behavior of the shift for intermediate frequencies, which has not been studied previously.« less